Method for absorbing the displacement of a plunger in a linear electrodynamic motor under the influence of an external force
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsGerald Aigouy, Jonathan Buquet, Thierry Trollier
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for absorbing the displacement, under the influence of an external force, of at least one plunger (10,20) in a linear electrodynamic motor comprising a least an induction coil (11, 21) magnetically coupled with the plunger. Said method comprises the steps of: detecting in said induction coil a current induced (I′ind) amplified relative to the induced current. The invention can be applied to cryogenic machines on board space ships.
Claims7
A method of damping the displacement, under the action of an external force, of at least one piston of a linear electrodynamic engine comprising at least an induction coil to which the piston is magnetically coupled, the method comprising the steps of:
- detecting a current (Iind) in the induction coil induced by the displacement of the piston;
- and
- generating and applying to the induction coil a damping current (I′ind) amplified in relation to the induced current, wherein the displacement of the piston due to the vibrations and the impacts is limited by the introduction of an additional active damping produced by the engine, the engine generating a magnetic force opposing the movement of the piston proportional to speed of the piston.
Dependencies are inferred from the claim text.